Update unmanaged-disks-deprecation.md

Extending date from Sept 30, 2023 to Jan 30, 2024.

Author: adatcher

articles/virtual-machines/unmanaged-disks-deprecation.md

@@ -19,7 +19,7 @@ With managed disks, you don't have to worry about managing storage accounts for
 
 ## How does this affect me?
 
-- As of September 30, 2023, new customers won't be able to create unmanaged disks.
+- As of January 30, 2024, new customers won't be able to create unmanaged disks.
 - On September 30, 2025, customers will no longer be able to start IaaS VMs by using unmanaged disks. Any VMs that are still running or allocated will be stopped and deallocated.
 
 ## What is being retired?